document.write( "Question 180443: The attraction (A) betwen a magnet and a bar of iron varies inversely as the square of the distance (d) between the magnet and the bar of iron. The attraction between the two is 2 newtons when the distance is 3 cm.
\n" ); document.write( "The measure of the attractin when the distance is 0.5 cm is? \n" ); document.write( "

Algebra.Com's Answer #135243 by Mathtut(3670) $\"\"$ $\"About$

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Ad^2=k where k is a constant
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\n" ); document.write( "lets find k
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\n" ); document.write( "we are given A=2 and d=3
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\n" ); document.write( " $\"2%283%29%5E2=k\"$
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\n" ); document.write( "so our constant k =18
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\n" ); document.write( "Ad=18
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\n" ); document.write( "now lets find A when d=.5.....remembering that in an inverse relationship when one variable increases the other decreases and vice versa. In this instance d is decreasing from 3 to .5 so we would expect A to increase
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\n" ); document.write( " $\"A%28.5%29%5E2=18\"$
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\n" ); document.write( " $\"highlight%28A=72%29\"$ newtons....and just like we knew A increased from 2 to 12 \n" ); document.write( "

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